Shuttle for shoe-sewing machines



Feb. 18, 1930. J. H. REED SHUTTLE FOR SHOE SEWING MACHINES Filed 001;. 14. 1922 Patented Feb. 18, 1930 UNITED. STATES PATENT GEE-16E JAMES H. REED, OF SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION,

A CORPORATION OF NEW JERSEY OF PATERSON, NEW JERSEY,

SHUTTLE FOR SHOE-SEWING MACHINES Application filed October 14, 1922. Serial No. 594,457.

This invention relates to shoe sewing machines of the type shown in my prior applications for Letters Patent filed August 12, 1921, Serial No. 491,694, and August 13, 1921, Serial No. 491,897, of which applications this case is in the nature of a division in part and with respect to the subject matter which it has in common therewith.

The machine shown in said prior applications is intended primarily for use in the manufacture of McKay shoes, although also capable of use for many other purposes as, for example, for stitching along the shanks on the inside of shoes of the Goodyear type. Said machine sews a lock stitch seam and has a straight barbed needle and a shuttle supplying a shuttle thread on the outer side of the sole of, the shoe, while within the shoe there is a co-operating horn provided with an oscillating looper supplying a cop thread.

The present invention relates to the shuttle employed in machines of this type and has for its objects to provide, a shuttle which is adapted also to perform the function of the usual loop spreader without interfering with the operation of the needle, and in which the necessity of a separate bobbin for the shuttle thread is eliminated, thereby permitting a greater quantity of shuttle thread to be carried in the available space within the shuttle andfacilitating the renewal of the shuttle thread, said shuttle having improved means, associated with the thread-carrying means which forms a part thereof, for applying the necessary tension to the thread as it is drawn from the shuttle.

The foregoing and other objects of the invention, together with means whereby the same may be'carried into effect, will best be understood from the following description of a preferred embodiment thereof illustrated in the accompanying'drawings, in which- Fig. 1 is a side elevation of the shuttle, the adjacent parts of the machine being shown in dotted lines.

Fig. 2 is a front elevation with the needle and shuttle race shown in dotted lines.

Fig. 3 is an edge view of the shuttle looking in the direction of the arrow in Fig. 2.

Fig. 4 is an axial section taken substan' tially on the line 44of Figure 2.

Fig. 5 is a side elevation, and Fig. 6 an interior elevation of the shuttle cover and parts associated therewith, showing the same removed from the body of the shuttle.

In the drawings there is indicated at 19 in Figures 1 and 2, a vertically reciprocating needle having an open hook or barb at its lower end. The needle 19 cooperates with a whirl or looper 20 (Fig. 1) in a horn 21 for supporting the work W, said looper being adapted, when said needle is at its lowermost position, to place a loop in the open hook or barb thereof. The mechanisms for operating the needle and whirl, form no part of the present invention and are not shown herein, being fully described in my prior applications above referred to.

The shuttle, which is of the discoidal type, comprises a body 10 having an open forward side about the edge of which is formed a seat 11 for a cover 12 which isdetachably secured in place to close said open side by locking means hereinafter described. The shuttle body 10 is formed adajcent its forward side with an annular rib or flange 13 by which said shuttle is guided in a shuttle race 14 carried by the machine frame. The shuttle is oscillated upon its axis by meansof'a shaft 15 which extends into the shuttle race 14 and is provided witha finger orlug 16 engaging a suitable notch or recess 28 in the periphery of the shuttle, as more fully explained in another application filed Oct. 18, 1922, Serial No. 595,266. r a I The shuttle is formed with a hook 18 which is located entirely in front of the plane of the front face of the shuttle and extends cirtom of the shuttle, but will clear said needle when at the upper side of the shuttle. The flange is cut away for a portion of its length, adjacent the hook 18, to'form a gap 17 which cooperates with a gap 22 in the shuttle race-way to permit the cop thread to pass about the'shuttle, The gap.22 is shaped to form a point 25 oppositely disposed with re spect to the hook l8 and cooperating therewith to take the loop from the needle, as more fully explained in my other "applications above referred to and in my application filed,

January 22, 1921, Serial No. 439,255. The

peripheral notch 23 in the shuttle body 10 to receivethe operating finger. '16 .is disposed opposite the gap 17 in the fiange 13, while the shuttle cover12 is formed with a notch 24 opposite the notch 23, to facilitate the passage of the thread, as more fully explained in my above mentioned application Serial No. 595,266; e r

I In the operation of the machine, the needle 19 comes up through the work N with the.

loop L of the 'cop' thread caught in its barb, as shown in Figure 1, and after said needle hascarrieditheloop above the point of the shuttle hook 18 (the'latter being'in its lowermost position) the shuttle is rotated in a counter-clockwise direction from the posi-. 'tion shown in Figure 2, so that the point ofthe shuttle hook enters the loop and takes the samedirectly from the needle. Thereafter continued rotationIof the shuttle causes the hook 18 to carry the loop to the top of the shuttle and pass it about the same, said shuttle, together with the shuttle thread, being thus passed through the loop.

As above stated, the shuttle is, in accordance with the present invention, constructed to act also as a bobbin, and to this end the detachable cover 12 is provided with a central hollow post 26 extending into the center of the shuttle substantially axially thereof and upon-which the shuttle thread T is directly wound, thereby avoiding the necessity of a separate bobbin and permitting a greater quantity of shuttle threadto be received within a shuttle of a given size. The shuttle thread 1 passes through a central opening 27 in the back} of the shuttle substantially in alinement with the post 26, where it is engaged by a plunger28 slidably mounted in said post and engaged by one end of a spring 29 housed in said post and bearing at its opposite end against a threaded plug 30, thereby causing said plunger'to press upo the shuttle thread and apply thenecessary tensionthereto- The shuttle body-10 is formed'adjacent the seat .11 with two oppositely disposed undercut recesses 31 and 32 which are engaged respectively by fixed and movable locking deg viceson the cover 12, whereby said cover is detachably secured in position; The fixed locking device comprises a lug or plate 33 riveted or otherwise secured in a recess in the inner face of said cover adjacent the edge thereof and projecting radially from said edge. The movable locking device comprises a locking, disk 34 rotatably mounted in a recess 35 in the inner face of the cover by means of a hub 36 journalled'in said cover and extending to the outerfac'e thereof, said hub having at its outer end suitable means, such as'a socket 37, for engagement by a key or other-turningimplement, whereby it may be'turned to lock and unlock the cover. The disk 35 comprises two concentric-portions of different diameters, the portion 38 of greater diameter constituting a projection which,

whensaid disk is turned, is adapted to engage the recess 32 and thereby lock the cover in position. For convenience in positioning said cover so as to facilitate the proper engagement of the locking devices with their respective recesses, said cover is formed at one edge with a notch 39 which is engaged by a pin 40 on the seat 11 when said cover is" in proper, position.

shuttle is in. use, permits saidcoverto. be readily removed for the purpose of replenishing the shuttle thread. 7'

' i What I claim is:

-1; A Sewing machine shuttle havi g a detachable cover fixed with relation to the shuttle when in position constituting a thread receiving bobbin.

, s5 V This construction, while retaining the cover securely in place when the 2. Adis'coidal sewing machine shuttle coinprising a unitary body having an open side and a detachable cover for said open side fixed with relation to the shuttle when in position "and provided witha thread receiv-' ing post disposed substantially axially ofsaid shuttle. f

'3. A discoidal sewing machine shuttle-having a substantially axial thread opening through which the thread'passes directly,

from the threadv mass, and a spring'pressed plunger within the shuttle engaging the thread at said opening within the shuttle and and engaging-the thread adjacent said opening. I

v 5. A discoidal sewing machine shuttle having at one side a detachable cover provided withfa'n axially disposed thread receiVing post and atjits opposite side anaxial'thread opening, a plunger guided in said post and engaging the thread adjacent said opening,"

and a spring housed in said post andengaging said plunger. I v

' 6. A discoidal shuttle for sewing machines having an open side, a detachable disk-like cover for normally closing said open side, and. fixed and movable locking elements carried by said cover, the body of said shuttle plunger towards a surface between which having undercut recesses to receive said looking elements. 7

7. A discoidal shuttle for sewing machines having an open side, a cover for said open side, and a rotary locking disk on said cover, said disk having a projecting portion adapted when said disk is turned to engage the edge of said open side and detachably lock said cover in position.

8. A discoidal shuttle for sewing machines having an open side formed with an annular seat and oppositely disposed undercut recesses adjacent said seat, a disk-like cover adapted to occupy said seat to close said open side a fixed lug on said cover to engage one of said recesses, and a rotary locking disk on said cover, said disk having a projecting portion adapted when said disk is turned to engage the other of said recesses.

9. A discoidal shuttle for sewing machines having an open side formed with an annular seat and an undercut recess adjacent said seat, a disk-like cover on said seat, and a rotary locking member comprising a disk on the inner side of said cover and having a hub extending therethrough and provided with means for engagement by a suitable turning tool, said disk comprising two concentric portions of different radius the portion of greater radius being adapted to engage said recess when said hub is turned, to detachably lock said cover in position.

10. A discoidal sewing machine shuttle comprising a body portion having an open side and a cover for said opening, said body being provided with an axial thread opening opposite the cover.

11. A discoidal sewing machine shuttle having a substantially axial thread opening through which the thread passes directly from the thread mass, and a tension device within the shuttle engaging the thread as it passes through said opening and pressing the thread against the inner face of the shuttle at the edge of the opening.

12. A sewing machine shuttle having a cover provided with a thread receiving post and a spring pressed plunger guided in said post engaging the thread and pressing the thread against the face of the shuttle opposite the cover.

13. A discoidal sewing machine shuttle provided with a thread receiving post and a tension device comprising a spring pressed plunger guided in said post engaging the thread and pressing the thread against the face of the shuttle opposite the post.

14. A sewing machine shuttle having a cover provided with a post projecting inwardly into the shuttle and forming a central support for the mass of shuttle thread, a thread engaging plunger mounted in said post, and a spring arranged to press said and the plunger the thread passes on its way from the shuttle to the work.

In testimony whereof I affix my signature.

JAMES H. REED. 

